Bio-EPDM/tungsten oxide nanocomposite foam with improved thermal storage and sea water resistance
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RESEARCH
Open Access
Bio‑EPDM/tungsten oxide nanocomposite foam with improved thermal storage and sea water resistance Jeong Seon Sang1 , Taehyung Kim2, Eun‑Young Park3, Juhyun Park4 , Yumin Eum5 and Kyung Wha Oh6*
*Correspondence: [email protected] 6 Professor, Dept. of Fashion, College of Art, Chung-Ang University, Seoul 06974, Republic of Korea Full list of author information is available at the end of the article
Abstract Bio ethylene propylene diene monomer (EPDM) produced with sugarcane-derived ethylene is an eco-friendly alternative material that can perform similarly to an oilbased synthetic rubber while reducing dependence on fossil resources. In this study, bio-EPDM/tungsten oxide nanocomposite was prepared to improve thermal insula‑ tion properties of bio-EPDM foam for application in highly functional eco-friendly diving wetsuits. The synthesized tungsten bronze nanorods (TBNRs) were doped with sodium and added to the bio-EPDM compound, then foam was generated by molding at 155 °C under a high-pressure. After foam molding, the effects of TBNRs on the sea water resistance as well as the thermal and mechanical properties of bio-EPDM foam were investigated. As a result, TBNRs remarkably improved the softness and photother‑ mal properties of bio-EPDM foam without a significant reduction of their mechanical properties. Especially, the excellent dimensional stability of the bio-EPDM foam with TBNRs under the sea water circumstance highlights its superiority as a material for marine sports. Overall results indicate that the bio-EPDM foam material containing TBNRs at the optimum ratio can be fully utilized for the development of eco-friendly and high-performance wetsuit materials with excellent elasticity, flexibility, and thermal insulation properties. Keywords: Bio-EPDM, Tungsten bronze, Thermal storage, Seawater resistance, Nanorods
Introduction With the recent increase in national income and the growing interest in quality of life, the popularization of marine sports has rapidly progressed. This has consequently led to a rapid growth of the marine sportswear market. Significant attention has focused on safe and functional marine sportswear products that enable the wearer to enjoy sports safely while providing protection from extreme environmental conditions. Wetsuits, a type of diving suit, are among the most popular items for marine sportswear and are designed to soak up water between the body and the suit while diving. They are manufactured by blowing synthetic rubber to form a foam, which is subsequently bonded with jersey fabric. Thermal insulation, strong elasticity, and high shock absorption are the required © The Author(s) 2020. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other thir
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